Photoshop: device N color spaces for color fill layers.

It would be beneficial to implement device N color space objects in color fill layers for many reasons. One of which is obvious - to create single color black objects for shadow creations. This feature would retain it's color numbers between color space conversions as well as retain said color designation between RGB and CMYK.

This feature would provide more people shifting to a RGB workflow for print with clear implications of file retention upon color space conversions.